Lexus ES: Vehicle Speed Information Communication Lost (C2178)
DESCRIPTION
The tire pressure warning ECU and receiver receives signals from the combination meter assembly via CAN communication. If a malfunction occurs in this communication line, DTC C2178 is output.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| C2178 | Vehicle Speed Information Communication Lost | Communication between the combination meter assembly and tire pressure warning ECU and receiver is interrupted for 10 seconds or more. |
| - |
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the tire pressure warning ECU and receiver, read the transmitter IDs and number of the transmitters (4 or 5) stored in the old ECU using the Techstream and write them down before removal.
-
It is necessary to perform initialization
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after registration of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.
PROCEDURE
| 1. | INSPECT COMBINATION METER ASSEMBLY (ON-VEHICLE INSPECTION) |
(a) Perform On-vehicle Inspection of the meter/gauge system.
Click here
HINT:
Check the meter function by referring to On-vehicle Inspection for the combination meter assembly.
| Result | Proceed to |
|---|---|
| Combination meter assembly is normal | A |
| Combination meter assembly is malfunctioning | B |
| A | .gif) | REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER |
| B | | GO TO METER / GAUGE SYSTEM |
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Lost Communication with Brake System Control Module (U0129)
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Short to GND in Outer Mirror Indicator(Slave) (C1AB3)
DESCRIPTION This DTC is stored when the blind spot monitor sensor LH detects a short to ground in the outer rear view mirror indicator LH. DTC No. Detection Item DTC Detection Condition Trouble Area C1AB3 Short to GND in Outer Mirror Indicator(Slave) Both of the following condition
Brake Hold
The brake hold system keeps the
brake applied when the shift lever is
in D, S or N with the system on and
the brake pedal has been
depressed to stop the vehicle. The
system releases the brake when the
accelerator pedal is depressed with
the shift lever in D or S to allow
smooth start off.
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